Backend termination of Web Messaging session

My configuration keeps failing… I need to terminate a Web Messaging session from my Node.js GraphQL gateway.

To end a conversation, send a DELETE request to /api/v2/conversations/webmessaging/{conversationId} with the correct auth headers. The docs imply this works, but I get a 403 Forbidden.

Here is the resolver logic:

async terminateConversation(_, { id }) {
 const res = await fetch(
 `https://api.mypurecloud.com/api/v2/conversations/webmessaging/${id}`,
 {
 method: 'DELETE',
 headers: {
 'Authorization': `Bearer ${token}`,
 'Content-Type': 'application/json'
 }
 }
 );
 return res;
}

The token is valid. Other GET calls work.

I checked the user permissions. The service account has Conversations:WebMessaging read and write.

Is there a hidden permission? Or does the DELETE endpoint require a different scope?

How do I correctly close a Web Messaging session from the backend without getting a 403?

The quickest way to solve this is to verify that your OAuth token actually includes the conversation:write scope. A 403 Forbidden error in the Genesys Cloud REST API almost always points to a missing scope or an insufficient permission set on the OAuth client, rather than a syntax error in the endpoint path. Since you are using Node.js, ensure your token generation step explicitly requests this scope.

When you request the token via the oauth/token endpoint, your payload must look like this:

{
 "grant_type": "client_credentials",
 "client_id": "YOUR_CLIENT_ID",
 "client_secret": "YOUR_CLIENT_SECRET",
 "scope": "conversation:write"
}

If you are using the genesys-cloud-node-client SDK, the configuration object should handle this, but many developers miss it when using raw fetch calls. Here is how I structure the fetch call in my Datadog integration scripts to ensure the headers are correct. Note that I always include the Accept header as application/json.

const res = await fetch(
 `https://api.mypurecloud.com/api/v2/conversations/webmessaging/${id}`,
 {
 method: 'DELETE',
 headers: {
 'Authorization': `Bearer ${token}`,
 'Content-Type': 'application/json',
 'Accept': 'application/json'
 }
 }
);

if (!res.ok) {
 const errorBody = await res.text();
 console.error(`Failed to terminate conversation: ${res.status} - ${errorBody}`);
 throw new Error(`Conversation termination failed with status ${res.status}`);
}

Also, check if the conversation is already in a closed or terminated state. The API will return a 409 Conflict or sometimes a 403 if the resource is already locked or closed. I usually wrap this in a try-catch block to inspect the response body for specific error codes. If the scope is correct and the conversation is active, the DELETE should succeed immediately. I run these checks in my Tokyo environment daily, and scope misconfigurations are the usual culprit.